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Diagnostic info
During startup guicey records startup metrics and remembers all details of configuration process. All this information is available through GuiceyConfigurationInfo bean in guice context.
Default diagnostic info rendering is provided to assist configuration problems resolution and better guicey internals understanding.
The simplest way to enable diagnostic reporting is using bundle .printDiagnosticInfo() option. This registers DiagnosticBundle with default reporting configuration. Bundle could be registered directly in order to customize output.
When .printDiagnosticInfo() enabled, the following kind of logs will be printed after server startup:
INFO [2016-08-01 21:22:50,898] ru.vyarus.dropwizard.guice.module.context.debug.report.DiagnosticReporter: Startup stats =
GUICEY started in 453.3 ms
│
├── [0,88%] CLASSPATH scanned in 4.282 ms
│ ├── scanned 5 classes
│ └── recognized 4 classes (80% of scanned)
│
├── [4,2%] COMMANDS processed in 19.10 ms
│ └── registered 2 commands
│
├── [6,4%] BUNDLES processed in 29.72 ms
│ ├── 2 resolved in 8.149 ms
│ └── 6 processed
│
├── [86%] INJECTOR created in 390.3 ms
│ ├── installers prepared in 13.79 ms
│ │
│ ├── extensions recognized in 9.259 ms
│ │ ├── using 11 installers
│ │ └── from 7 classes
│ │
│ └── 3 extensions installed in 4.188 ms
│
├── [1,3%] HK bridged in 6.583 ms
│ ├── using 2 jersey installers
│ └── 2 jersey extensions installed in 660.9 μs
│
└── [1,1%] remaining 5 ms
INFO [2016-08-01 21:22:50,901] ru.vyarus.dropwizard.guice.module.context.debug.report.DiagnosticReporter: Configuration diagnostic info =
COMMANDS =
Cli (r.v.d.g.d.s.features) *SCAN
EnvCommand (r.v.d.g.d.s.features) *SCAN, GUICE_ENABLED
BUNDLES =
CoreInstallersBundle (r.v.d.g.m.installer)
Foo2Bundle (r.v.d.g.d.s.bundle)
FooBundleRelative2Bundle (r.v.d.g.d.s.bundle)
HK2DebugBundle (r.v.d.g.m.j.debug) *LOOKUP, REG(2)
DiagnosticBundle (r.v.d.g.m.c.debug)
GuiceRestrictedConfigBundle (r.v.d.g.support.util) *LOOKUP
INSTALLERS and EXTENSIONS in processing order =
jerseyfeature (r.v.d.g.m.i.f.j.JerseyFeatureInstaller) *REG(2)
HK2DebugFeature (r.v.d.g.m.j.d.service)
resource (r.v.d.g.m.i.f.j.ResourceInstaller)
FooBundleResource (r.v.d.g.d.s.bundle) *REG(3)
FooResource (r.v.d.g.d.s.features) *SCAN
GUICE MODULES =
FooModule (r.v.d.g.d.s.features) *REG(2)
FooBundleModule (r.v.d.g.d.s.bundle)
HK2DebugModule (r.v.d.g.m.j.d.HK2DebugBundle)
DiagnosticModule (r.v.d.g.m.c.d.DiagnosticBundle)
GRestrictModule (r.v.d.g.s.u.GuiceRestrictedConfigBundle)
GuiceSupportModule (r.v.d.guice.module)
INFO [2016-08-01 21:22:50,909] ru.vyarus.dropwizard.guice.module.context.debug.report.DiagnosticReporter: Configuration context tree =
APPLICATION
├── extension FooBundleResource (r.v.d.g.d.s.bundle)
├── module FooModule (r.v.d.g.d.s.features)
├── module GuiceSupportModule (r.v.d.guice.module)
├── -disable LifeCycleInstaller (r.v.d.g.m.i.feature)
│
├── CoreInstallersBundle (r.v.d.g.m.installer)
│ ├── installer JerseyFeatureInstaller (r.v.d.g.m.i.f.jersey)
│ └── installer ResourceInstaller (r.v.d.g.m.i.f.jersey)
│
├── Foo2Bundle (r.v.d.g.d.s.bundle)
│ ├── extension FooBundleResource (r.v.d.g.d.s.bundle) *IGNORED
│ ├── module FooBundleModule (r.v.d.g.d.s.bundle)
│ ├── -disable ManagedInstaller (r.v.d.g.m.i.feature)
│ │
│ └── FooBundleRelative2Bundle (r.v.d.g.d.s.bundle)
│ └── module FooModule (r.v.d.g.d.s.features) *IGNORED
│
├── HK2DebugBundle (r.v.d.g.m.j.debug)
│ ├── installer JerseyFeatureInstaller (r.v.d.g.m.i.f.jersey) *IGNORED
│ ├── extension HK2DebugFeature (r.v.d.g.m.j.d.service)
│ └── module HK2DebugModule (r.v.d.g.m.j.d.HK2DebugBundle)
│
├── DiagnosticBundle (r.v.d.g.m.c.debug)
│ └── module DiagnosticModule (r.v.d.g.m.c.d.DiagnosticBundle)
│
├── BUNDLES LOOKUP
│ ├── HK2DebugBundle (r.v.d.g.m.j.debug) *IGNORED
│ │
│ └── GuiceRestrictedConfigBundle (r.v.d.g.support.util)
│ └── module GRestrictModule (r.v.d.g.s.u.GuiceRestrictedConfigBundle)
│
└── CLASSPATH SCAN
└── extension FooResource (r.v.d.g.d.s.features)
Default reporting contains 3 sections:
- How guicey spent time
- What was configured
- From where configuration items come from
GUICEY started in 453.3 ms
Overall guicey time measured: GuiceBundle methods plus part of Hk configuration time (hk started after bundle). All items below represent guicey time detalization. Items always detail time of direct parent.
Most of this time actually spent on class loading. For example, report above represent test direct execution.
But when this test executed as part of suit time become GUICEY started in 52.95 ms because most classes were pre-loaded by other tests.
├── [0,88%] CLASSPATH scanned in 4.282 ms
│ ├── scanned 5 classes
│ └── recognized 4 classes (80% of scanned)
Classpath scan performed just once. Represents only time spent resolving all classes in configured packages. Guicey will later use this resolved classes to search commands (if enabled), installers and extensions.
scanned 5 classes means that 5 classed were found (overall) in configured packages. recognized 4 classes Show effectiveness of classpath scanning (how many classes were actually used as installer, extension or command).
├── [4,2%] COMMANDS processed in 19.10 ms
│ └── registered 2 commands
Commands time includes time spent on commands search (in classes from classpath scan; if enabled .searchCommands()) and calling .injectMemebers on configured environment commands (last part is always performed, but it's very fast so most likely commands section will not appear if .searchCommands() is not enabled)
├── [6,4%] BUNDLES processed in 29.72 ms
│ ├── 2 resolved in 8.149 ms
│ └── 6 processed
Bundles time includes bundles lookup time (if not .disableBundleLookup()), dropwizard bunles lookup (if .configureFromDropwizardBundles()) and bundles execution.
2 resolved in 8.149 ms indicated bundles resolved with guicey bundle lookup or from dropwizard bundles.
6 processed - overall processed bundles (all registered bundles, including just resolved).
├── [86%] INJECTOR created in 390.3 ms
│ ├── installers prepared in 13.79 ms
│ │
│ ├── extensions recognized in 9.259 ms
│ │ ├── using 11 installers
│ │ └── from 7 classes
│ │
│ └── 3 extensions installed in 4.188 ms
All installers and extensions operations (except jersey related features) performed inside of guice module and so included into overall injector creation time.
installers prepared in 13.79 ms include installers search in classpath (if scan enabled), instantiation and preparing for usage (remove duplicates, sort).
extensions recognized in 9.259 ms - all manually configured extensions and all classes from classpath scan (from 7 classes) are recognized by all registered installers (using 11 installers) using installer match method. Recognized installers bound to guice context (or custom action performed for binding installers).
3 extensions installed in 4.188 ms - all recognized extensions are installed with installers install methods.
├── [1,3%] HK bridged in 6.583 ms
│ ├── using 2 jersey installers
│ └── 2 jersey extensions installed in 660.9 μs
Jersey starts after dropwizard bundles processing and so after GuiceBundle execution. This time is tracked as (overall) guicey time. Here guicey register required HK bindings and (some hk beans in guice) and executes jersey installers (installers implement JerseyInstaller) to process jersey specific features. For example, all resources and jersey extensions installed here (because requires hk specific bindings).
Note that installation time (2 jersey extensions installed in 660.9 μs) is so tiny just because empty resources (without methods) were used. In real application installation time will be bigger.
└── [1,1%] remaining 5 ms
Represent not explicitly tracked time, spent by guicey for other small operations. Shown on tree to indicate that all major parts were shown.
Section intended to compactly show all configuration (to quickly see what was configured).
This and third section used condensed package notion:
CoreInstallersBundle (r.v.d.g.m.installer)
Assumed that all classes in application will be uniquely identifiable by name and package info shown just to be able to understand exact class location. Logback shrinker used.
Report also indicates duplicate registrations by REG(N) marker, where N - amount of installations (ignored installations will be visible in configuration tree). Counted:
- item registration in different places (e.g. different bundles)
- duplicate registrations in simgle place (e.g.
.extensions(MyExt.class, MyExt.class))
All configuration items (commands, modules, installers, extension, bundles) are identified by class. Duplicate entities are not allowed and simply ignored.
For example, if extension registered manually and by classpath scan then it will be registered once, but internally guicey will remember both configuration sources.
In contrast to other items, bundles and modules are registered by instance, but still uniqueness is checked by type: only first instance registered and other instances considered as duplicate.
COMMANDS =
Cli (r.v.d.g.d.s.features) *SCAN
EnvCommand (r.v.d.g.d.s.features) *SCAN,GUICE_ENABLED
Shows commands resolved with classpath scan (enabled with .searchCommands()).
The following markers used:
- SCAN - item from classpath scan (always)
- GUICE_ENABLED - marks environment command, which could contain guice injections (other commands simply doesn't trigger application run and so injector never starts)
BUNDLES =
CoreInstallersBundle (r.v.d.g.m.installer)
Foo2Bundle (r.v.d.g.d.s.bundle)
FooBundleRelative2Bundle (r.v.d.g.d.s.bundle)
HK2DebugBundle (r.v.d.g.m.j.debug) *LOOKUP, REG(2)
DiagnosticBundle (r.v.d.g.m.c.debug)
GuiceRestrictedConfigBundle (r.v.d.g.support.util) *LOOKUP
All registered bundles are shown as a tree (to indicate transitive bundles).
The following markers used:
- LOOKUP - bundle resolved with bundle lookup mechanism
- DW - bundle recognized from registered dropwizard bundle
INSTALLERS and EXTENSIONS in processing order =
jerseyfeature (r.v.d.g.m.i.f.j.JerseyFeatureInstaller) *REG(2)
HK2DebugFeature (r.v.d.g.m.j.d.service)
resource (r.v.d.g.m.i.f.j.ResourceInstaller)
FooBundleResource (r.v.d.g.d.s.bundle) *REG(3)
FooResource (r.v.d.g.d.s.features) *SCAN
Shows used installers (only installers which install extensions) and installed extensions.
Both installers and extensions are shown in the processing order (sorted according to @Order annotations).
The following markers used:
- SCAN - item from classpath scan (even if extension or installer were registered manually also to indicate item presence in classpath scan)
- LAZY - extensions annotated with @LazyBinding
- HK - extension annotated with @HK2Managed
GUICE MODULES =
FooModule (r.v.d.g.d.s.features) *REG(2)
FooBundleModule (r.v.d.g.d.s.bundle)
HK2DebugModule (r.v.d.g.m.j.d.HK2DebugBundle)
DiagnosticModule (r.v.d.g.m.c.d.DiagnosticBundle)
GRestrictModule (r.v.d.g.s.u.GuiceRestrictedConfigBundle)
GuiceSupportModule (r.v.d.guice.module)
All registered guice modules.
Configuration tree is useful to understand from where configuration items come from.
Installer disables are shown like:
├── -disable LifeCycleInstaller (r.v.d.g.m.i.feature)
Duplicate registrations (ignored by guicey) are shown like:
│ ├── extension FooBundleResource (r.v.d.g.d.s.bundle) *IGNORED
If number in configuration report (e.g.REG(3)) doesn't match registration appearances, then item registered multiple times in one of this places.
Diagnostic info rendering may be used for custom rendering (showing in web page or some other staff). Rendering is performed with 3 beans, available for injection (when bundle registered):